Charlie Sheen said that he used prostitutes basically because he was paying for a service so that they would be discrete and he would have no ties.
I am not defending the practice (although in light of the US Supreme Court's activist judicial decision that sex between two consenting adults cannot be made illegal, such laws are unconstitutional) but just offering some advice to any call girls would see this as a possible boost to their trade.
If the client is Schwarzenegger, they won't need repeat business. Just a book deal (like Arianna has now).